e_comp_wl: remove the workaround code that did roundtrip for initialization of wayland.

e_comp_wl: remove the workaround code that did roundtrip for initialization of wayland.

workaround code was added like below.
remove it, because this code causes deadlock error.

commit 668850643f72daa89c857c1cc78d49578a927794
Author: Duna Oh <duna.oh@samsung.com>
Date:   Tue Apr 21 12:34:44 2015 +0900

e_comp_wl: add call to dispatch the requests of binding wayland global interfaces

Summary:
- Add call to dispatch the requests of creating a wayldand client, getting the registry, and binding global interfaces, because we need global objects immediately after we request.
- Load desktop shell module while initting e_comp, not idle time.

Test Plan:
(1) Run enlightenment on wayland
(2) If e_module attemps to make the "Error loading Module" popup window, you will see deadlock waiting for the wayland sync "done" event to be received.
This means the wayland global interfaces including wl.compositor is not ready.

below is the mainloop we are blocked
---------------------------------------------------------------
_ecore_wl_init_wait(void)
{
   while (!_ecore_wl_disp->init_done)
     wl_display_dispatch(_ecore_wl_disp->wl.display);
}

Change-Id: I13336dc7e35101915f4d8808488df0fa7d7698a0